The HP-150
allowed users to activate a feature by touching the screen.
The HP 9121 drives were
the first commercially available 3-1/2 inch floppy-disk drives
in the United States.

The HP-150 personal computer
featured a touch-sensitive screen that allowed users to activate
a feature by touching the screen. The PC had an MS-DOS operating
system and an Intel 8088 microprocessor. The HP-150
was introduced with twin 3-1/2 inch HP 9121 disc drivesthe
first commercially available 3-1/2 inch floppy-disk drives in the
United States. These drives were less expensive, more reliable and
held the same amount of information as the 5-1/4 inch IBM-compatible
drives.